Automatic gun.



N0. 814,79. PATENTED MAIL-13, 1906 W. TRABUE.

AUTOMATIC GUN.

APPLICATION FILED MAR.18, 1905.

barren sra rns PATENT, orrron.

WILLIAM TRABUE, OF LOUISVILLE, KENTUCKY, ASSIGNOR OF ONE-THIRD TCDELCZIER MOXLEY AND ONE-THIRD TO C. C. MOCLARTY, OF LOUIS YILLE,KENTUCKY.

AUTOMATlC GUN.

Specification of Letters Patent.

Patented March. 13, 1906.

Application filed iimh 13.1905. Serial No. 250,843.

I gun or istol in which the recoil of the breechbolt W en the gun isfired may serve to eject the spent cartridge and place another in thebarrel ready for firin or in which the trigger may be manipulate toeffect a like result, in which latter case the spring which resists therecoil whenthe gun is fired need not be compressed. by the manipulationof the trigger. Thus the weapon may be fired slowly shot by shot,entirely by trigger manipulation, or it may be fired in rapid successionuntil the cartridges are exhausted by the recoil mechanism.

The invention consists in certain constructions and mechanicalcombinations, substantially as will be described, and pointed out in Ithe claims.

Figure 1 is a longitudinal centralsection .of a pistol in which myinvention is embodied, the breech being shown in closed position. Fig. 2is a partial elevation andpartial section of the same, the breech-boltbeing shown in recoiled or open position. Fig. 3 is a perspective detailview showing arts of the breech-operating mechanism s ightly separated,sothat the construction may be better understood. Fig. 4 is a brokenelevation of some of the operating parts of my device, and Fig. i is abroken view of the same parts in difierent position. 5 is a brokensectional detail of the bolt and firing-piece, and Fi 5 is a similardetail of the same parts in a ifierent position. Fig. 6 is a section ofa modification of the recoil mechanism, whereby a coiled spring isemployed to take up the recoil instead of the flat spring and lever ofFigs. 1 and 2. Fig.7 is a detail elevationof the sear-lifting mechanismoutside the frame.

The numeral 1 indicates the frame, housing, or receiver. 2 denotes thebarrel, and 3 thebreech piece or bolt. bolt cates in the frame. Themagazine 4 is under the bolt when the bolt is closed. Cartridges arelifted in the magazine by any suitable follower, as usual inwhat isknown as a boxmagazine gun. The follower is not shown, and some otherparts are omitted for clearness of illustration, such parts beingunderstood to be of any usual construction.

The breech-bolt 3 has a downwardly-extending arm 49, which is pivotallyconnected to a link 5, and this link 5 is pivoted to a le- I ver 6,which is pivoted in the frame of the gun, as indicated at 7. The lever 6has a hook 8, which projects below its pivot. A notched segment 9 isrigid with lever 6. Sega ment 9 has an arm 10, which is piv oted to ashort link 1 1, and this link 11 is pivoted to lever 12, which lever 12is pivoted to the frame or butt plate. A flat spring 13, secured in theframe, presses up against lever 12, thus drawing on link 11 and tendingtorock the segment 9 and its connected lever 6, so as to close thebreech-bolt. It will thus be seen that spring 13 acts on what may betermed a compound toggle-lever to close the bolt but as the toggles ofthe lever system do not entirely straighten in closing the bolt the boltis not really, looked in closed position, but is merely pressed forwardby the force of spring 13. i

The trigger 15 is pivoted at 16 in the lower part of: the frame. Thecocking-hook 17 is pivoted to and carried by the trigger above the pivot16, and this hook 17 has an upwardly extending arm 18, which arm ridesagainst an incline 19 in the frame. A pull on the trigger causes thchook17 to engage the hook 8 on lever 6, thus rocking 'the lever 6 and itsconnected segment on the pivot 7 and causing the breech-bolt 3 to movefrom closed to open positionthat is, from the position in Fig. 1 to theposition in full lines, Fig. 2. When the hook 17 has moved slightlybeyond the position shown in Fig. 2, it becomes detached from hook 8,and the spring 13 then becomes operative to close the breech-bolt unlessit is held open by other mechanism tobe explained.

The firing-pin 20 is on a pivoted piece- 21,

. which is pivoted in the breech-bolt 3 and has 22, which enoountersanabutment 23.

' frame.

in the frame or at the rear of the barrel as the breech bolt closes,thus bringing the pin against the cartridge to fire the same.

A sear 25 is pivoted at 26 in the frame and extends rearwardly from saidpivot, its finger 27 engaging the notches in segment 9 when permitted,and thus acting to hold the toggle mechanism and bolt back, as in Fig.2. The trigger 15 has a rigid arm 30 extending upward alongside of sear25 and having a finger 31 extendin over said sear in position to engagean inc ined piece 29 on said sear. A pull on trigger 15 causes thebreech bolt to move back, as has been explained. Searfinger 27 thenengages a notch in the segment 9 and prevents the closin of the bolt(n0rmally) until the arm 30 0 the trigger (bearing the finger 31) movesforward and causes said finger 31 to engage the inclined piece 29 onthesear, thus lifting finger 27 of the sear from the notch in segment 9and permitting spring 13 to close the breechbolt, carrying a cartridgeinto the barrel when closing and firing the cartridge as the closingmovement is com leted. The finger of arm 30 rides alon t e face of theinclined piece 29 and is free 0m said'piece 29 at the instant the firingtakes place. The pull on the trigger cannot be released quick enough topermit finger 31 to again engage inclined piece 29 while the breech ismoving back under the impulse of recoil. The trigger on its release ispressed forward at its lower end by spring 33, acting as usual, thefinger 31 thenriding past the piece 29, as is common in sear-and-pawlmovements. When it is not desired that the sear 25 shall control thefiring movement, the rear end of said sear is lifted so that it cannotenga e the notches in segment 9. This is effecte by means of aslide-plate 40, which has lugs41 and 42 above and below the swinging endof the sear 25.

through a slot in the frame and into a camslot 44- in a slide-bar 45 onthe outside of the The slide-bar 15 is guided by a pin 46 on theslidebar, entering a horizontal slot inthe frame, and a screw 47,passing through a horizontal slot in the slide-bar, so that theslide-bar can only move horizontally. Then as the lug 43 rests in thecam-slot 4,4 the movement of the slide-bar-along the frame by pressureon button serves to lift the plate 40 inside the frame, and this liftsthe rear end of the sear 25', so that it cannot engage segment 9. Whenso lifted, the trigger pull operates to open the breech until hook '17slips off from hook 8 and spring 13 closes and fires the gun. Thus byplacing sear 2 5 in its engaging position the gun may be loaded andfired deliberately by the trigger pull, the pull serving to fire the gunin the same manner as a double'action revolver is fired, while if thesear be disengaged the first A lug 43, projecting from the side of theslide-plate 40, extends cartridge may be loaded and fired by the triggermovement, as has been explained, and then if the trigger be held backthe other cartridges will be fired automaticallyin rapid succession, aswill be explained.

It has been explained how the backward pull of the trigger releases thehook 17 from hook 8, thus permitting the breech to close, carrying acartridge forward into the barrel and firing it. The backward pressuremfthe cartridge immediately throws the bolt open against the p're'ssure ofspring 13. As the bolt moves to the rear it encounters the recoil-lever50, which .is pivoted to the frame, and is pressed forward by the strongspring 51. The spent shell is ejected by any usual ejector, as iscommon. The magazine supplies a new cartridge in front of the bolt 3.The spring 51, acting on lever 50, throws the bolt rapidly forward,spring 13' assisting through the (lescribed train of mechanism. When thebolt carries a cartridge into the barrel and fires it, the operation isrepeated, and so on as long as there are cartridges in the magazine.

The sear 25 may be held to working position by spring 55, and the finger27 of said sear may bepressecl to working position by a spring 56,mounted on block 40.

In Fig. 6 I illustrate a recoil-spring 66, on 1 which the bolt actsdirectly instead of through a' lever-arm, as 50.

In some of the figures l have omitted parts not considered essential, toavoid complication in the drawings.

It will be understood that when the gun is worked by the trigger pullthe strong spring .51 is not compressed. The bolt moves to the rear farenoughto permit the feeding of cartridges before compression of thisspring takes place. The strong spring 51 when compressed by thebreech-block under the sudden impulse of the explosion acts to throw thebreech-bolt swiftly forward to closed position, and while the weakspring 13 ma assist this closing movement probably suc assistance isusually not needed but when the gun is workedby the trigger movement thebreech does not move back far enough to encounter the resistance of thisstrong spring.

A loading-gate is shown at the sideof the opening in the frame. toprevent the escape of shells or cartridges except when thrown out by,the ejector. Y

What I claim is 1., The combination, in a firearm, of a bolt,

a trigger and mechanism connected thereto bywhich the breech may beopened by the trigger movement, and a spring acted on by the recoil ofthe breech-bolt when thrown to a 015111 the combination of the breech- 1b y 1 nolt tri yer and to le-lever mechanism b 1 v which the boot may beopened by the trigger aiv ent, a seer engaging the mechanism to i :1 lboil; reirscted, and aspring to close belt when the sear is released byfurther movement.- v

in a gun, the combination of a bolt, an enacting-lever connectedthereto, and a string operating to close the bolt under normalconditions of hand mani ulation, and a second spring operating on t ebolt only at extreme rearward movement such as is sensed by recoil, tothrow the bolt forward. 7 e. in a gun, a belt, a trigger connectedthereto by mechanism whereby the bolt may he opened by the triggermovement, a sear in position to normally engage the mechanism to holdthe bolt open, and means outside the.

frame Wherebythese'ar may beheld inoperative and the mechanism leftunder control of the trigger. I I

5. Inagnn, the combination of the breechclosing bolt, automatic meanswhereby the bolt may be closed from fnll i'ecoiled position, and a levermechanism connected to the bolt by which thebolt may be opened iarenough to l'oadwithout engaging the-automatic bolteiosing means. I I

6. In a gun, the combination of a breechbelt, lever mechanism by whichthe bolt may be opened, it t e'ger engaging said lever mechthe bolt whenat the rear of anism to operate the same, a light spring actmechanismoperating to open and close the same, a sear engaging said mechanism tohold the bolt open, a sliding piece in the frame by which said seamstlnown out of engagement, and means for locking said sliding piece.

9, In a gun, the breech-bolt and its operating lever mechanism, a seerengaging the mechanism to hold the bolt open,a slidepiece insidetheirame by which said sear may be lifted, and a sliding bar outside theframe with which saidslide in the frame engages through a slot in theframe.

.In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM TRABUE Witnesses:

' W. C. TRABUE, H. C. EEMPLE.

